How Is GIS Used in Map Making?
GIS stands for "Geographic Information Systems" and is a type of computer program used in mapping and decision making. GIS software allows information to be added to existing maps and new maps to be created combining details from several sources, including satellites.
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History
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Computer-based Geographic Information Systems have been widely used since the 1970s. Developed in the 1960s and perhaps even earlier, a collaboration of government agencies such as United States Census Bureau and the United States Geological Survey resulted in the beginning of the modern-day GIS.
Technology
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GIS uses computer software to combine satellite photos and other details to "layer" information about an area onto a base map. This layering is similar to stacking overhead transparencies on top of each other, but in a computer program each layer can be switched on and off to allow data to be interpreted in different ways.
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How It Is Used
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GIS technology allows users to quickly assemble a wide variety of information about an area. Thus individuals can construct maps tailored to their own needs. GIS is used to make decisions such as where to build certain businesses, what areas of farms should be fertilized, what land areas should be environmentally protected and so on.
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References
- Photo Credit Illustration of a satellite image by Nicemonkey from Fotolia.com
